Piston construction



April 1,580,042 s. HIBASCQ PISTON CONSTRUCTION Filed May 18, 1925 3 Sheets-Sheet 1 g. 'HIBHSCD ATTORNEYS.

IN VEN TOR.

s. HIBASCO PISTON CONSTRUCTION Filed'May 18, 1925 3 Sheets-Sheet 2 April 6 1926.

INVENTOR.

S. HIBFISBD ATTORNEYS.

April 6 192 6.

- 1,580,042 S. HIBASCO PISTON CONSTRUCTION 3 Sheets-Sheet 5 Filed May 18, 1925 INVENTOR.

S. HIBHSC U A TTORNEYS.

Patented Apr. 6, 192 6,

UNITED STATES PATENT orricn.

STEVEN HIBLSCO, OF PALO. ALTQCALIFORNIA, ASSIGNOB OF'OIIE-HALF T HENRY I.

' KLUGIEBEB, OF PALO ALTO, CALIFORNIA.

PISTON CONSTRUCTION.

Application fled lay 18,1925. Serial No. 81,163.

To all whom it may concern: mon to employ a piston having a plurality Be it known that I, STEVEN Hmnsco, a of expansion rings carried, in the surface 65 citizen of the United States, residing'at of the piston. These rings cause scoring Palo Alto, in the county of Santa Clara and in the sides of the cylinder wall within State of California, have invented new and which the piston moves and these rin s also useful Improvements in Piston Construcresult in t e pumping of oil into t e ex tions, of W ich the following is a specificaplosion chamber of the cylinder, with the tion. result that the spark plugs become foul. This invention relates to improvements in It is also very difficult to maintain the 10 pistons and has particular reference to :1. rings in such a condition that there will not piston for use in reciprocating engines. be some leakage of the oil past the same.

The principal object of this invention is to I have, therefore, endeavored to provide provide a piston which will eliminate the a piston which will prevent these difiiculuse of the ordinar piston rings. ties and thereby construct a very useful and 15 Another object 0 this invention is to proefficient device.

duce a iston which will be tight at all times. In the accompanying drawings wherein A stil further object is to provide apisfor the urpose of illustration is shown a 7 ton which will revent scoring. preferred embodiment of my invention, the An additional object of this invention is numeral 5 designates a piston head which to provide a iston which will permit of has flanges 6 and 7. Between these flanges am 1e lubrication without pumping oil. the various sections of. the piston side walls ther objects and advantages will be apare secured.

arent during the course of the following Referring to Figure II, it will be noted escri tion. that there are four filler blocks designated 25 In t e accompanying drawings forming a by the numerals 8, 9, 11 and 12. These part of this specification, and in which like filler blocks have champered ends, as shown numerals are em loyed to designate like at 13 and 14 (see Figures VII, IX and XI). parts throughout t esame, To these filler blocks are riveted or other- Figure I is a side elevation of my imwise attached as shown at 16, the ,main

30 proved piston, piston sections designated as a whole by the Figure II is a cro s section taken on th numeral 17 As these main piston sections line 2-2 of Fi re I, are identical, in construction but one will Figure III is a bottom plan view of the be described. piston head, At 18 I have shown an upstanding porv$5 Figure IV is a cross section taken on th tion, the edges of which are adapted tobe line H of Figure I, contacted by the edges of the next adjacent Figure V is a cross ection taken. on the sections and it.will be noted by viewing li -5.5 of Fi r I, Figure VII that these edges are out upon Figure VI is a vertical cross section taken an angle as best shown at 19 and 21. They 7 on the line 6--6 of Figure I, are also out upon a bevel as shown at 22 Figure VII is a side elevation of one of (see Figures II and IV). This upstanding the iston sections, portion 12 is formed integral with a flange Flgure VIII is a bottom plan view of 23 from which flange the main wall of the Fi re VII, piston depends. This main wall is also cut 45 igure IX is a top plan view of Figure upon an angle which corresponds to the VII, and angle 19 above described and 1s a continua- Flgure X is a diagrammatic illustration tion of the angles 19 and 21 (see Figure VII). 10 showing the manner in which the sections The interior of each section is grooved overlap, with the side walls to extend in a as hown at 2; and 26, so as to provide ex- 9 fiat plane, and i pansion rings 27 and 28,'respectively. The Figure XI is a perspective view of .one of result of this construction is that when the the ler blocks. I four sections are assembled as shown in Fig- 10 At the present time in engines, itjs comures I and VI, the angular cut edges of the filler blocks and side wall sections will fit as shown in these two figures, presenting a piston. of the standard shape.

After the sections have been thus assembled the expansion rings 27 and 28 are in serted within the piston, which tends to force the sections outwardly which are mechanically contracted and then inserted within the cylinder, the result being that the four sections will res ond into intimate contact with the sides 0 the cylinder wall and when properly lubricated will form a perfect seal against any loss of energy leaking past the piston.

Further due to the long bearing surface side slap will be prevented due to the diagonal cuts 19 and 21 and the oil will be continuously applied to the cylinder walls, scraped therefrom and again applied, thereby precluding any possibility ofthe oil passing above the piston head. Due to the large bearing surface between the filler blocks and the flange 6, it will be impossible for any gas to leak from a point above the piston to a point within the piston.

This piston will not freeze under high speed, nor will it cause overheating of the oil in the engine, due to the large heating surface. This piston will also stop metal- 30 lizing of the oil which is commonly caused.

by the rings scraping against the cylinder walls, with the result that the metal particles in the oil wear the bearings of the engine and decrease the efficiency thereof, the result being that this piston produces more power and consequent economy.

It will thus be seen that I have provided a piston which will perform all of the ob- .jects above set forth.

It is to be understood that the form of my invention herewith shown and described is to be taken as a preferred example of the same, and that various changes in the shape, size and arrangement of parts may be resorted to without departing from the spirit of the invention or the scope of the subjoined claim.

- Having thus described my inventioml claim In a device of the character described, a head having spaced" flanges, a plurality of depending sections movably secured between said flanges, a filler block secured to each of said sections and interposed between said flanges, said sections havin their abutting edges out upon an angle, an

means for expanding said piston, for the H purpose specified.

In testimony whereof I afiix my signature. STEVEN HIBASCO. 

